class_name RangeIterator extends Iterator

var _index: int
var _to: int
var _step: int

func _init(from: int, to: int, step: int = 1) -> void:
    _index = from - 1
    _to = to
    _step = step

func clone() -> RangeIterator:
    return RangeIterator.new(_index, _to, _step)

func next() -> Option:
    if _index < _to:
        _index += 1
        return Option.some(_index)
    else: return Option.none